by hitting a couple keys. >> reporter: often the ransom note looks like an official notice from the fbi, accusing you of a crime. >> you have inappropriate content you have stolen content, you have child porn on your machine, that scares people, even if they've never done it. still that the fbi has said we found child porn, that scares people to their very core. >> that's why they pay up? >> yes. >> you should never pay a ransom, even if you do regain access to your computer, the hackers have probably dropped other viruss on to your system. rans ransomware has grown so quickly, the fbi just posted a warning on its internet crimes website. >> it's getting very tedious, and you estimate you've lost business as a result? >> yes, i've been up late just trying to solve the problem. >> with more than 4,000 products in his store. >> snow skis, snowboards, water skis, wake boards. >> reporter: he's moving his shop information to cloud computing to prevent another attack. no customer or financial data was breached, but the ransomware hack has cost him time and money. >> our sales are down signif

from the fbi and the atf are expected to join this investigation some time tomorrow. when vallejo mayor osby davis saw the magnitude of the damage to the law office he shares with michael thompson, the mayor couldn't help but shed a few tears. davis later told the vallejo times herald to say he is upset would be an understatement. the fire was reported at about 1:30 saturday morning at the small office building on tuolumne street across from the solano superior court. investigators think someone set the fire intentionally. >> a suspicious fire at this time, it's under investigation and we hopefully have some more information in the coming days as to the cause of the fire. >> reporter: vallejo police say the same building has been targeted by vandals in the past few months, who have thrown rocks through windows. and while investigators search for a motive for the fire, they say they are now looking at all the possibilities, including if mayor davis has any political enemies who would want to target him. >> well, the fact that it involves the mayor of vallejo, the fact that he is a high p

. >> mcafee says it is successful because the ransom note looks like an official notice from the fbi accusing you of a crime. >> they try to scare you. you have inappropriate content, stolen content and child pornography. even if they haven't done it, it scares people. to think that fbi found child pornography on your computer scares people. >> and that's why they pay up. >> that's why they pay. >> reporter: don't pay he says. ransom ware hacks have grown so quickly the fbi posted a warning on the internet crimes website. >> it is tedious and you estimate you lost business as a result. >> yes. i have been up late trying to solve the problem. >> reporter: with 4,000 products in his store. >> snow skis, wake boards. >> steve is now moving his shop information to cloud computing to prevent another attack. he says no customer or financial data was breached but the ransom ware cost him time and money. >> our sales are down significantly by the day. >> how do you avoid it. start with site adviser. it is a free download that takes a few seconds and once you have the program anytime you visi

in south san jose. fbi agents arrested two men on federal drug charges. the agency says it's gang task force led the operation but it won't say if the suspects are part of a larger organized crime or gang. sources tell nbc bay area news the neighborhood is for parolees and lots of people on probation. >>> today bay area relatives of ambassador chris stevens announced a special memorial service for the u.s. diplomat killed in libya last month. the ceremony will take place at san francisco's city hall october 16th. steven's family has invited a list of dignitaries, including george schultz and senator dianne feinstein. stevens grew up in the bay area attending piedmont high. after, he went on to uc berkeley and uc hastings in san francisco for law school. the public is being invited to the service but you should know the city hall rotunda only holds about 700 people. stevens was just 52 years old. >>> it was one thing when burglars took their jewelry. when they took the family puppy, a san jose city councilman stepped in. burglars first broke into melissa's home last summer. on monday he

he won the election by just three votes. then he had to leave vallejo through bankruptcy. the fbi is expected to investigate the weekend fire as an act of domestic terrorism. >>> the noise traveled for miles and prompted hundreds of complaints from people in the east bay. the source of their frustration, an outdoor rave at the oakland coliseum. this is youtube video of that rave that started saturday night. it was called beyond wonderlandful police say the music was so loud, people pr san leandro all the way frommal need over were calling 911. and they had to call in extra dispatchers to handle all the calls. the city officials in oakland have since issued an apology and have called for the immediate review of the situation. >>> president obama and mitt romney squaring off face to face, getting ready for the first debate. and a new television ad is reminding the candidates not to forget one of the year's biggest tragedies. >>> plus, a local official charging taxpayers for the appearances? why he is costing the taxpayers even more. >>> good evening. i'm jeff ranieri. record setting

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